import {
  count,
  createUser,
  db,
  del,
  get,
  insertComment,
  insertDump,
  patch,
  post,
  test,
} from "../helpers.ts";
import { assertEquals, assertExists, assertFalse } from "@std/assert";
import {
  castCommentLike,
  removeCommentLike,
} from "../../services/comment-like-service.ts";
import { APIException } from "../../lib/api-exception.ts";
import type { Comment } from "../../../shared/comment.ts";
import type { Dump } from "../../../shared/dump.ts";
import type { PaginatedData } from "../../../shared/api.ts";
import type { PublicUser } from "../../../shared/user.ts";

test("comments: post, list in order, count on the dump", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id } = insertDump({ userId: owner.id });
  const first = await post<Comment>(`/api/dumps/${id}/comments`, {
    auth: other.auth,
    json: { body: "  first  " },
  });
  assertEquals(first.status, 201);
  assertEquals(first.data.body, "first");
  assertEquals(first.data.authorUsername, other.username);
  const reply = await post<Comment>(`/api/dumps/${id}/comments`, {
    auth: owner.auth,
    json: { body: "reply", parentId: first.data.id },
  });
  assertEquals(reply.data.parentId, first.data.id);
  const list = await get<Comment[]>(`/api/dumps/${id}/comments`);
  assertEquals(list.data.map((c) => c.body), [
    "first",
    "reply",
  ]);
  assertEquals((await get<Dump>(`/api/dumps/${id}`)).data.commentCount, 2);
});

test("comments: validation, auth and unknown dumps", async () => {
  const user = await createUser();
  const { id } = insertDump({ userId: user.id });
  for (const body of ["", "   ", "x".repeat(5001)]) {
    assertEquals(
      (await post(`/api/dumps/${id}/comments`, {
        auth: user.auth,
        json: { body },
      }))
        .status,
      400,
    );
  }
  assertEquals(
    (await post(`/api/dumps/${id}/comments`, { json: { body: "hi" } })).status,
    401,
  );
  assertEquals(
    (await post(`/api/dumps/nope/comments`, {
      auth: user.auth,
      json: { body: "hi" },
    }))
      .status,
    404,
  );
});

test("comments on a private dump: owner only", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id } = insertDump({ userId: owner.id, isPrivate: true });
  assertEquals(
    (await post(`/api/dumps/${id}/comments`, {
      auth: other.auth,
      json: { body: "x" },
    }))
      .status,
    404,
  );
  assertEquals(
    (await post(`/api/dumps/${id}/comments`, {
      auth: owner.auth,
      json: { body: "x" },
    }))
      .status,
    201,
  );
  assertEquals(
    (await get(`/api/dumps/${id}/comments`, { auth: other.auth })).status,
    404,
  );
});

test("comments: the dump's owner is notified, the commenter isn't", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id } = insertDump({ userId: owner.id, title: "Mine" });
  await post(`/api/dumps/${id}/comments`, {
    auth: owner.auth,
    json: { body: "self" },
  });
  assertEquals(count(`SELECT COUNT(*) as n FROM notifications;`), 0);
  const c = await post<Comment>(`/api/dumps/${id}/comments`, {
    auth: other.auth,
    json: { body: "nice" },
  });
  const note = db.prepare(`SELECT user_id, type, data FROM notifications;`)
    .get() as {
      user_id: string;
      type: string;
      data: string;
    };
  assertEquals(note.user_id, owner.id);
  assertEquals(note.type, "dump_commented");
  assertEquals(JSON.parse(note.data).commentId, c.data.id);
  assertEquals(JSON.parse(note.data).dumpTitle, "Mine");
});

test("PATCH /api/comments/:id: author and moderator edit, others can't", async () => {
  const author = await createUser();
  const other = await createUser();
  const mod = await createUser({ role: "moderator" });
  const { id: dumpId } = insertDump({ userId: author.id });
  const commentId = insertComment({ dumpId, userId: author.id, body: "orig" });
  assertEquals(
    (await patch(`/api/comments/${commentId}`, {
      auth: other.auth,
      json: { body: "x" },
    }))
      .status,
    401,
  );
  const edited = await patch<Comment>(`/api/comments/${commentId}`, {
    auth: author.auth,
    json: { body: " edited " },
  });
  assertEquals(edited.status, 200);
  assertEquals(edited.data.body, "edited");
  assertExists(edited.data.updatedAt);
  assertEquals(
    (await patch(`/api/comments/${commentId}`, {
      auth: mod.auth,
      json: { body: "m" },
    }))
      .status,
    200,
  );
  assertEquals(
    (await patch(`/api/comments/${commentId}`, {
      auth: author.auth,
      json: { body: "" },
    }))
      .status,
    400,
  );
  assertEquals(
    (await patch(`/api/comments/${crypto.randomUUID()}`, {
      auth: author.auth,
      json: { body: "x" },
    })).status,
    404,
  );
});

test("DELETE /api/comments/:id soft-deletes, and a deleted comment can't be edited", async () => {
  const author = await createUser();
  const other = await createUser();
  const { id: dumpId } = insertDump({ userId: author.id });
  const commentId = insertComment({
    dumpId,
    userId: author.id,
    body: "gone soon",
  });
  assertEquals(
    (await del(`/api/comments/${commentId}`, { auth: other.auth })).status,
    401,
  );
  assertEquals(
    (await del(`/api/comments/${commentId}`, { auth: author.auth })).status,
    200,
  );
  const [c] = (await get<Comment[]>(`/api/dumps/${dumpId}/comments`)).data;
  assertEquals(c.deleted, true);
  assertEquals(c.body, "");
  assertEquals((await get<Dump>(`/api/dumps/${dumpId}`)).data.commentCount, 0);
  assertEquals(
    (await patch(`/api/comments/${commentId}`, {
      auth: author.auth,
      json: { body: "back" },
    }))
      .status,
    400,
  );
});

test("comment likes: count, conflicts, likers list and notifications", async () => {
  const author = await createUser();
  const liker = await createUser();
  const { id: dumpId } = insertDump({ userId: author.id });
  const commentId = insertComment({ dumpId, userId: author.id });

  assertEquals(castCommentLike(commentId, liker.id).likeCount, 1);
  assertEquals(castCommentLike(commentId, author.id).likeCount, 2);
  try {
    castCommentLike(commentId, liker.id);
    throw new Error("expected a conflict");
  } catch (err) {
    assertEquals((err as APIException).status, 409);
  }
  // Only the other user's like notifies the author.
  assertEquals(
    count(
      `SELECT COUNT(*) as n FROM notifications WHERE type = 'comment_liked';`,
    ),
    1,
  );

  const likers = await get<PaginatedData<PublicUser>>(
    `/api/comments/${commentId}/likers`,
  );
  assertEquals(likers.data.items.length, 2);
  assertFalse("email" in likers.data.items[0]);

  assertEquals(removeCommentLike(commentId, liker.id).likeCount, 1);
  try {
    removeCommentLike(commentId, liker.id);
    throw new Error("expected a 404");
  } catch (err) {
    assertEquals((err as APIException).status, 404);
  }
  assertEquals(
    (db.prepare(`SELECT like_count FROM comments WHERE id = ?;`).get(
      commentId,
    ) as {
      like_count: number;
    }).like_count,
    1,
  );
});

test("comment likes on a private dump: owner only", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id: dumpId } = insertDump({ userId: owner.id, isPrivate: true });
  const commentId = insertComment({ dumpId, userId: owner.id });
  try {
    castCommentLike(commentId, other.id);
    throw new Error("expected a 404");
  } catch (err) {
    assertEquals((err as APIException).status, 404);
  }
  assertEquals(castCommentLike(commentId, owner.id).isPrivate, true);
  assertEquals((await get(`/api/comments/${commentId}/likers`)).status, 404);
  assertEquals(
    (await get(`/api/comments/${commentId}/likers`, { auth: owner.auth }))
      .status,
    200,
  );
});